Life

A look at killer dolphins, plus hibernating plankton, growing mammal brains and more in this week’s news

Plankton sleep through apocalypse
Tiny photosynthetic organisms may have survived decades of darkness following the meteor crash that killed the dinosaurs by resting, Dutch and Portuguese researchers report online May 17 in Nature Communications. The group revived more recent plankton organisms trapped in the mud below Swedish fjords, concluding that such organisms can live for up to a century without sunlight.